How much pinch should I feel on this engine. I have this engine with only 10 tanks ran through it (some would say its not even broke in yet) and now with engine at room temp and glow plug out, I can feel some pinch but can pretty easily turn it over. I tried the same test with my 12tz and can't get it past TDC. These tests are done in the cars and turning the flywheel from bottom with my finger. If the 21vz-r is too loose I can't understand why, because we always preheat the head to 220 degrees F. bafoe starting and during breakin on the breakin bench have wrapped the head with aluminum tape and maintained at least 200 F. with a heat gun. Then left the tape on when we ran it around in the car with at least 170 F. So does a 21 have less pinch then a 12? Or is my p/s wore out already? We just touch it to the starter box and its running and it has very good power in the car.